Hello,
I am completely stupid :). The issue has been solved.
I overlooked a function which had a return when a user is not logged in..
add_action( 'get_header', 'tsm_do_acf_form_head', 1 );
function tsm_do_acf_form_head() {
// Bail if not logged in or not able to post
if ( ! ( is_user_logged_in() || current_user_can('publish_posts') ) ) {
return;
}
acf_form_head();
}
Thank you very much for your help, above code was the issue and I removed it.